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Compare the published Medicare service mix of Arthur P. Chou, M.D. with clinicians in the same registry specialty: Specialty details in registry.

CA · Exact areaEdit location

2024 published service data · 470 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Howard Tung, M.D.

Neurosurgery (CMS) · San Diego, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Critical care, first 30-74 minutes (99291)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
76%Service-mix similarityView profile →

Ayman Mohamed Salem, M.D.

Neurosurgery (CMS) · Burbank, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
71%Service-mix similarityView profile →

Asha Muthuraman Iyer, MD, PHD

Neurosurgery (CMS) · Sacramento, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
71%Service-mix similarityView profile →

Andrew Do Nguyen, M.D.,PH.D.

Neurosurgery (CMS) · San Diego, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Critical care, first 30-74 minutes (99291)
71%Service-mix similarityView profile →

Brian Hwang, MD

Neurosurgery (CMS) · Laguna Hills, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Critical care, first 30-74 minutes (99291)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
70%Service-mix similarityView profile →

Langston Tyler Holly, MD

Neurosurgery (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
68%Service-mix similarityView profile →

Martin Huy Pham, M.D.

Neurosurgery (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Critical care, first 30-74 minutes (99291)
67%Service-mix similarityView profile →

Jerry Noel, D.O.

Neurosurgery (CMS) · Santa Monica, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Critical care, first 30-74 minutes (99291)
67%Service-mix similarityView profile →

Xiaoran Zhang, M.D.

Neurosurgery (CMS) · Danville, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Critical care, first 30-74 minutes (99291)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
66%Service-mix similarityView profile →

Amit Goyal, M.D.

Neurosurgery (CMS) · Oxnard, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Critical care, first 30-74 minutes (99291)
64%Service-mix similarityView profile →

Sabareesh Kumar Natarajan, M.D. M.S.

Neurosurgery (CMS) · La Mesa, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Critical care, first 30-74 minutes (99291)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
63%Service-mix similarityView profile →

Marcus Zachariah, M.D., PH.D.

Neurosurgery (CMS) · San Diego, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
63%Service-mix similarityView profile →
How this comparison works

We use the same calendar year of CMS Medicare Physician & Other Practitioners data for both providers. Published non-drug service counts are combined by HCPCS code across places of service. We apply log(1 + count), normalize the vectors, and compare them using cosine similarity.

Candidates share the reference provider’s current NPPES primary taxonomy and match the location you enter. We examine up to 500 candidates in NPI order, then show up to 12 with the highest positive similarity within that set. The score is not a percentile, medical recommendation, or prediction. Suppressed services are not estimated. Medicare fee-for-service data does not describe a provider’s entire practice.

Source: CMS Medicare Physician & Other Practitioners - by Provider and Service : 2024-12-01 · Published May 21, 2026.